/* Create a task, set its name and run it. */
static int
run_task(struct lib_context *lc, struct raid_set *rs, char *table, int type, char *name)
{
/*
* DM_UUID_LEN is defined in dm-ioctl.h as 129 characters;
* though not all 129 must be used (md uses just 16 from
* a quick review of md.c.
* We will be using: (len vol grp name)
*/
char uuid[DM_UUID_LEN];
int ret;
struct dm_task *dmt;
_init_dm();
ret = (dmt = dm_task_create(type)) && dm_task_set_name(dmt, name);
if (ret && table)
ret = parse_table(lc, dmt, table);
if (ret) {
if (DM_DEVICE_CREATE == type) {
ret = dmraid_uuid(lc, rs, uuid, DM_UUID_LEN, name) &&
dm_task_set_uuid(dmt, uuid) && dm_task_run(dmt);
} else
ret = dm_task_run(dmt);
}
_exit_dm(dmt);
return ret;
}
int dm_mount_aspect(substrate_t *substrate, u64 header_offset, u8 *header_key, char *name)
{
char *params;
struct dm_task *task;
task = dm_task_create(DM_DEVICE_CREATE);
if(!task) {
die("dm_task_create");
}
if(!dm_task_set_name(task, name)) {
die("dm_task_set_name");
}
if(!dm_task_set_uuid(task, name)) {
die("dm_task_set_uuid");
}
params = steg_malloc(strlen(substrate->filename) + 4096);
sprintf(params, "%s %zu ", substrate->filename, header_offset);
sprint_hex(params + strlen(params), header_key, KEY_BYTES);
if(!dm_task_add_target(task, 0, substrate->bytes, "steg", params)) {
die("dm_task_add_target");
}
if(!dm_task_run(task)) {
die("dm_task_run");
}
dm_task_destroy(task);
steg_free(params);
return 0;
}
int dm_addmap(int task, const char *name, const char *target,
const char *params, uint64_t size, int ro, const char *uuid,
int part, mode_t mode, uid_t uid, gid_t gid)
{
int r = 0;
struct dm_task *dmt;
char *prefixed_uuid = NULL;
#ifdef LIBDM_API_COOKIE
uint32_t cookie = 0;
uint16_t udev_flags = 0;
#endif
if (!(dmt = dm_task_create (task)))
return 0;
if (!dm_task_set_name (dmt, name))
goto addout;
if (!dm_task_add_target (dmt, 0, size, target, params))
goto addout;
if (ro && !dm_task_set_ro (dmt))
goto addout;
if (task == DM_DEVICE_CREATE && uuid) {
prefixed_uuid = make_prefixed_uuid(part, uuid);
if (prefixed_uuid == NULL)
goto addout;
if (!dm_task_set_uuid(dmt, prefixed_uuid))
goto addout;
}
if (!dm_task_set_mode(dmt, mode))
goto addout;
if (!dm_task_set_uid(dmt, uid))
goto addout;
if (!dm_task_set_gid(dmt, gid))
goto addout;
dm_task_no_open_count(dmt);
#ifdef LIBDM_API_COOKIE
if (!udev_sync)
udev_flags = DM_UDEV_DISABLE_LIBRARY_FALLBACK;
if (task == DM_DEVICE_CREATE &&
!dm_task_set_cookie(dmt, &cookie, udev_flags))
goto addout;
#endif
r = dm_task_run (dmt);
#ifdef LIBDM_API_COOKIE
if (task == DM_DEVICE_CREATE)
dm_udev_wait(cookie);
#endif
addout:
dm_task_destroy (dmt);
free(prefixed_uuid);
return r;
}
static int _dm_create(int task, int wait,
const char *name, const char *uuid,
uint64_t start, uint64_t length,
const char *target, const char *table,
struct era_dm_info *info)
{
struct dm_task *dmt;
uint32_t cookie = 0;
int rc;
if (!(dmt = dm_task_create(task)))
return -1;
if (!dm_task_set_name(dmt, name))
goto out;
if (uuid && !dm_task_set_uuid(dmt, uuid))
goto out;
if (target && !dm_task_add_target(dmt, start, length, target, table))
goto out;
if (wait && !dm_task_set_cookie(dmt, &cookie, 0))
goto out;
rc = dm_task_run(dmt);
if (wait)
(void) dm_udev_wait(cookie);
if (rc && info)
{
struct dm_info dmi;
if (!dm_task_get_info(dmt, &dmi))
goto out;
info->target_count = dmi.target_count;
info->open_count = dmi.open_count;
info->suspended = dmi.suspended;
info->exists = dmi.exists;
info->major = dmi.major;
info->minor = dmi.minor;
}
dm_task_destroy(dmt);
return rc ? 0 : -1;
out:
dm_task_destroy(dmt);
return -1;
}
/* Get uuid of a device */
static struct dm_task *_get_device_info(const struct dm_event_handler *dmevh)
{
struct dm_task *dmt;
struct dm_info info;
if (!(dmt = dm_task_create(DM_DEVICE_INFO))) {
log_error("_get_device_info: dm_task creation for info failed");
return NULL;
}
if (dmevh->uuid)
dm_task_set_uuid(dmt, dmevh->uuid);
else if (dmevh->dev_name)
dm_task_set_name(dmt, dmevh->dev_name);
else if (dmevh->major && dmevh->minor) {
dm_task_set_major(dmt, dmevh->major);
dm_task_set_minor(dmt, dmevh->minor);
}
/* FIXME Add name or uuid or devno to messages */
if (!dm_task_run(dmt)) {
log_error("_get_device_info: dm_task_run() failed");
goto failed;
}
if (!dm_task_get_info(dmt, &info)) {
log_error("_get_device_info: failed to get info for device");
goto failed;
}
if (!info.exists) {
log_error("_get_device_info: device not found");
goto failed;
}
return dmt;
failed:
dm_task_destroy(dmt);
return NULL;
}
/*
* Low level device-layer operations.
*/
static struct dm_task *_setup_task(const char *name, const char *uuid,
uint32_t *event_nr, int task,
uint32_t major, uint32_t minor)
{
struct dm_task *dmt;
if (!(dmt = dm_task_create(task)))
return_NULL;
if (name)
dm_task_set_name(dmt, name);
if (uuid && *uuid)
dm_task_set_uuid(dmt, uuid);
if (event_nr)
dm_task_set_event_nr(dmt, *event_nr);
if (major)
dm_task_set_major_minor(dmt, major, minor, 1);
return dmt;
}
/* Check, if a device exists. */
static int _fill_device_data(struct thread_status *ts)
{
struct dm_task *dmt;
struct dm_info dmi;
if (!ts->device.uuid)
return 0;
ts->device.name = NULL;
ts->device.major = ts->device.minor = 0;
dmt = dm_task_create(DM_DEVICE_INFO);
if (!dmt)
return 0;
dm_task_set_uuid(dmt, ts->device.uuid);
if (!dm_task_run(dmt))
goto fail;
ts->device.name = dm_strdup(dm_task_get_name(dmt));
if (!ts->device.name)
goto fail;
if (!dm_task_get_info(dmt, &dmi))
goto fail;
ts->device.major = dmi.major;
ts->device.minor = dmi.minor;
dm_task_destroy(dmt);
return 1;
fail:
dm_task_destroy(dmt);
dm_free(ts->device.name);
return 0;
}
static int _create_and_load_v4(struct dm_task *dmt)
{
struct dm_task *task;
int r;
uint32_t cookie;
/* Use new task struct to create the device */
if (!(task = dm_task_create(DM_DEVICE_CREATE))) {
log_error("Failed to create device-mapper task struct");
_udev_complete(dmt);
return 0;
}
/* Copy across relevant fields */
if (dmt->dev_name && !dm_task_set_name(task, dmt->dev_name)) {
dm_task_destroy(task);
_udev_complete(dmt);
return 0;
}
if (dmt->uuid && !dm_task_set_uuid(task, dmt->uuid)) {
dm_task_destroy(task);
_udev_complete(dmt);
return 0;
}
task->major = dmt->major;
task->minor = dmt->minor;
task->uid = dmt->uid;
task->gid = dmt->gid;
task->mode = dmt->mode;
/* FIXME: Just for udev_check in dm_task_run. Can we avoid this? */
task->event_nr = dmt->event_nr & DM_UDEV_FLAGS_MASK;
task->cookie_set = dmt->cookie_set;
r = dm_task_run(task);
dm_task_destroy(task);
if (!r) {
_udev_complete(dmt);
return 0;
}
/* Next load the table */
if (!(task = dm_task_create(DM_DEVICE_RELOAD))) {
log_error("Failed to create device-mapper task struct");
_udev_complete(dmt);
r = 0;
goto revert;
}
/* Copy across relevant fields */
if (dmt->dev_name && !dm_task_set_name(task, dmt->dev_name)) {
dm_task_destroy(task);
_udev_complete(dmt);
r = 0;
goto revert;
}
task->read_only = dmt->read_only;
task->head = dmt->head;
task->tail = dmt->tail;
r = dm_task_run(task);
task->head = NULL;
task->tail = NULL;
dm_task_destroy(task);
if (!r) {
_udev_complete(dmt);
goto revert;
}
/* Use the original structure last so the info will be correct */
dmt->type = DM_DEVICE_RESUME;
dm_free(dmt->uuid);
dmt->uuid = NULL;
r = dm_task_run(dmt);
if (r)
return r;
revert:
dmt->type = DM_DEVICE_REMOVE;
dm_free(dmt->uuid);
dmt->uuid = NULL;
/*
* Also udev-synchronize "remove" dm task that is a part of this revert!
* But only if the original dm task was supposed to be synchronized.
*/
if (dmt->cookie_set) {
cookie = (dmt->event_nr & ~DM_UDEV_FLAGS_MASK) |
(DM_COOKIE_MAGIC << DM_UDEV_FLAGS_SHIFT);
dm_task_set_cookie(dmt, &cookie,
(dmt->event_nr & DM_UDEV_FLAGS_MASK) >>
DM_UDEV_FLAGS_SHIFT);
}
static int _first_status(int task,
const char *name,
const char *uuid,
uint64_t *start, uint64_t *length,
size_t target_size, char *target_ptr,
size_t params_size, char *params_ptr)
{
uint64_t a, b;
struct dm_task *dmt;
struct dm_info dmi;
char *tgt, *prm;
int rc = -1;
if (!(dmt = dm_task_create(task)))
return -1;
if (name && !dm_task_set_name(dmt, name))
goto out;
if (uuid && !dm_task_set_uuid(dmt, uuid))
goto out;
if (!dm_task_run(dmt))
goto out;
if (!dm_task_get_info(dmt, &dmi))
goto out;
if (!dmi.exists)
{
error(0, "target %s does not exists",
name ? name : (uuid ? uuid : "<NULL>"));
goto out;
}
(void)dm_get_next_target(dmt, NULL, &a, &b, &tgt, &prm);
if (start)
*start = a;
if (length)
*length = b;
if (target_size > 0 && target_ptr)
{
if (strlen(tgt) >= target_size)
{
error(0, "too long target name");
goto out;
}
strcpy(target_ptr, tgt);
}
if (params_size > 0 && params_ptr)
{
if (strlen(prm) >= params_size)
{
error(0, "too long target params");
goto out;
}
strcpy(params_ptr, prm);
}
rc = 0;
out:
dm_task_destroy(dmt);
return rc;
}
int era_dm_info(const char *name,
const char *uuid,
struct era_dm_info *info,
size_t name_size, char *name_ptr,
size_t uuid_size, char *uuid_ptr)
{
struct dm_task *dmt;
struct dm_info dmi;
int rc = -1;
if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
return -1;
if (name && !dm_task_set_name(dmt, name))
goto out;
if (uuid && !dm_task_set_uuid(dmt, uuid))
goto out;
if (!dm_task_run(dmt))
goto out;
if (!dm_task_get_info(dmt, &dmi))
goto out;
if (info)
{
info->target_count = dmi.target_count;
info->open_count = dmi.open_count;
info->suspended = dmi.suspended;
info->exists = dmi.exists;
info->major = dmi.major;
info->minor = dmi.minor;
}
if (dmi.exists && name_size > 0 && name_ptr)
{
const char *dm_name;
size_t dm_name_len;
dm_name = dm_task_get_name(dmt);
if (!dm_name)
goto out;
dm_name_len = strlen(dm_name);
if (dm_name_len >= name_size)
{
rc = dm_name_len + 1;
goto out;
}
strcpy(name_ptr, dm_name);
}
if (dmi.exists && uuid_size > 0 && uuid_ptr)
{
const char *dm_uuid;
size_t dm_uuid_len;
dm_uuid = dm_task_get_uuid(dmt);
if (!dm_uuid)
goto out;
dm_uuid_len = strlen(dm_uuid);
if (dm_uuid_len >= uuid_size)
{
dm_task_destroy(dmt);
return dm_uuid_len + 1;
}
strcpy(uuid_ptr, dm_uuid);
}
rc = 0;
out:
dm_task_destroy(dmt);
return rc;
}
static int
dm_addmap (int task, const char *target, struct multipath *mpp,
char * params, int ro) {
int r = 0;
struct dm_task *dmt;
char *prefixed_uuid = NULL;
uint32_t cookie = 0;
if (!(dmt = dm_task_create (task)))
return 0;
if (!dm_task_set_name (dmt, mpp->alias))
goto addout;
if (!dm_task_add_target (dmt, 0, mpp->size, target, params))
goto addout;
if (ro)
dm_task_set_ro(dmt);
if (task == DM_DEVICE_CREATE) {
if (strlen(mpp->wwid) > 0) {
prefixed_uuid = MALLOC(UUID_PREFIX_LEN +
strlen(mpp->wwid) + 1);
if (!prefixed_uuid) {
condlog(0, "cannot create prefixed uuid : %s",
strerror(errno));
goto addout;
}
sprintf(prefixed_uuid, UUID_PREFIX "%s", mpp->wwid);
if (!dm_task_set_uuid(dmt, prefixed_uuid))
goto freeout;
}
dm_task_skip_lockfs(dmt);
#ifdef LIBDM_API_FLUSH
dm_task_no_flush(dmt);
#endif
}
if (mpp->attribute_flags & (1 << ATTR_MODE) &&
!dm_task_set_mode(dmt, mpp->mode))
goto freeout;
if (mpp->attribute_flags & (1 << ATTR_UID) &&
!dm_task_set_uid(dmt, mpp->uid))
goto freeout;
if (mpp->attribute_flags & (1 << ATTR_GID) &&
!dm_task_set_gid(dmt, mpp->gid))
goto freeout;
condlog(4, "%s: %s [0 %llu %s %s]", mpp->alias,
task == DM_DEVICE_RELOAD ? "reload" : "addmap", mpp->size,
target, params);
dm_task_no_open_count(dmt);
if (task == DM_DEVICE_CREATE &&
!dm_task_set_cookie(dmt, &cookie,
DM_UDEV_DISABLE_LIBRARY_FALLBACK))
goto freeout;
r = dm_task_run (dmt);
if (task == DM_DEVICE_CREATE)
dm_udev_wait(cookie);
freeout:
if (prefixed_uuid)
FREE(prefixed_uuid);
addout:
dm_task_destroy (dmt);
return r;
}
static int _reload_with_suppression_v4(struct dm_task *dmt)
{
struct dm_task *task;
struct target *t1, *t2;
int r;
/* New task to get existing table information */
if (!(task = dm_task_create(DM_DEVICE_TABLE))) {
log_error("Failed to create device-mapper task struct");
return 0;
}
/* Copy across relevant fields */
if (dmt->dev_name && !dm_task_set_name(task, dmt->dev_name)) {
dm_task_destroy(task);
return 0;
}
if (dmt->uuid && !dm_task_set_uuid(task, dmt->uuid)) {
dm_task_destroy(task);
return 0;
}
task->major = dmt->major;
task->minor = dmt->minor;
r = dm_task_run(task);
if (!r) {
dm_task_destroy(task);
return r;
}
/* Store existing table size */
t2 = task->head;
while (t2 && t2->next)
t2 = t2->next;
dmt->existing_table_size = t2 ? t2->start + t2->length : 0;
if ((task->dmi.v4->flags & DM_READONLY_FLAG) ? 1 : 0 != dmt->read_only)
goto no_match;
t1 = dmt->head;
t2 = task->head;
while (t1 && t2) {
while (t2->params[strlen(t2->params) - 1] == ' ')
t2->params[strlen(t2->params) - 1] = '\0';
if ((t1->start != t2->start) ||
(t1->length != t2->length) ||
(strcmp(t1->type, t2->type)) ||
(strcmp(t1->params, t2->params)))
goto no_match;
t1 = t1->next;
t2 = t2->next;
}
if (!t1 && !t2) {
dmt->dmi.v4 = task->dmi.v4;
task->dmi.v4 = NULL;
dm_task_destroy(task);
return 1;
}
no_match:
dm_task_destroy(task);
/* Now do the original reload */
dmt->suppress_identical_reload = 0;
r = dm_task_run(dmt);
return r;
}
/* Create new device and load table to it. */
static int _create_and_load_v4(struct dm_task *dmt)
{
struct dm_task *task;
int r;
log_verbose("create and load called");
/* Use new task struct to create the device */
if (!(task = dm_task_create(DM_DEVICE_CREATE))) {
log_error("Failed to create device-mapper task struct");
return 0;
}
/* Copy across relevant fields */
if (dmt->dev_name && !dm_task_set_name(task, dmt->dev_name)) {
dm_task_destroy(task);
return 0;
}
if (dmt->uuid && !dm_task_set_uuid(task, dmt->uuid)) {
dm_task_destroy(task);
return 0;
}
task->major = dmt->major;
task->minor = dmt->minor;
task->uid = dmt->uid;
task->gid = dmt->gid;
task->mode = dmt->mode;
r = dm_task_run(task);
dm_task_destroy(task);
if (!r)
return r;
/* Next load the table */
if (!(task = dm_task_create(DM_DEVICE_RELOAD))) {
log_error("Failed to create device-mapper task struct");
return 0;
}
/* Copy across relevant fields */
if (dmt->dev_name && !dm_task_set_name(task, dmt->dev_name)) {
dm_task_destroy(task);
return 0;
}
task->read_only = dmt->read_only;
task->head = dmt->head;
task->tail = dmt->tail;
r = dm_task_run(task);
task->head = NULL;
task->tail = NULL;
dm_task_destroy(task);
if (!r)
goto revert;
/* Use the original structure last so the info will be correct */
dmt->type = DM_DEVICE_RESUME;
dm_free(dmt->uuid);
dmt->uuid = NULL;
r = dm_task_run(dmt);
if (r)
return r;
revert:
dmt->type = DM_DEVICE_REMOVE;
dm_free(dmt->uuid);
dmt->uuid = NULL;
if (!dm_task_run(dmt))
log_error("Failed to revert device creation.");
return r;
}
int dm_create_device(const char *name,
const char *device,
const char *cipher,
const char *type,
const char *uuid,
uint64_t size,
uint64_t skip,
uint64_t offset,
size_t key_size,
const char *key,
int read_only,
int reload)
{
struct dm_task *dmt = NULL;
struct dm_info dmi;
char *params = NULL;
char *error = NULL;
char dev_uuid[DM_UUID_LEN] = {0};
int r = -EINVAL;
uint32_t read_ahead = 0;
uint32_t cookie = 0;
uint16_t udev_flags = 0;
params = get_params(device, skip, offset, cipher, key_size, key);
if (!params)
goto out_no_removal;
if (type && !strncmp(type, "TEMP", 4))
udev_flags = CRYPT_TEMP_UDEV_FLAGS;
/* All devices must have DM_UUID, only resize on old device is exception */
if (reload) {
if (!(dmt = dm_task_create(DM_DEVICE_RELOAD)))
goto out_no_removal;
if (!dm_task_set_name(dmt, name))
goto out_no_removal;
} else {
dm_prepare_uuid(name, type, uuid, dev_uuid, sizeof(dev_uuid));
if (!(dmt = dm_task_create(DM_DEVICE_CREATE)))
goto out_no_removal;
if (!dm_task_set_name(dmt, name))
goto out_no_removal;
if (!dm_task_set_uuid(dmt, dev_uuid))
goto out_no_removal;
if (_dm_use_udev() && !dm_task_set_cookie(dmt, &cookie, udev_flags))
goto out_no_removal;
}
if (read_only && !dm_task_set_ro(dmt))
goto out_no_removal;
if (!dm_task_add_target(dmt, 0, size, DM_CRYPT_TARGET, params))
goto out_no_removal;
#ifdef DM_READ_AHEAD_MINIMUM_FLAG
if (_dev_read_ahead(device, &read_ahead) &&
!dm_task_set_read_ahead(dmt, read_ahead, DM_READ_AHEAD_MINIMUM_FLAG))
goto out_no_removal;
#endif
if (!dm_task_run(dmt))
goto out_no_removal;
if (reload) {
dm_task_destroy(dmt);
if (!(dmt = dm_task_create(DM_DEVICE_RESUME)))
goto out;
if (!dm_task_set_name(dmt, name))
goto out;
if (uuid && !dm_task_set_uuid(dmt, dev_uuid))
goto out;
if (_dm_use_udev() && !dm_task_set_cookie(dmt, &cookie, udev_flags))
goto out;
if (!dm_task_run(dmt))
goto out;
}
if (!dm_task_get_info(dmt, &dmi))
goto out;
r = 0;
out:
if (_dm_use_udev()) {
(void)dm_udev_wait(cookie);
cookie = 0;
}
if (r < 0 && !reload) {
if (get_error())
error = strdup(get_error());
dm_remove_device(name, 0, 0);
if (error) {
set_error(error);
free(error);
}
}
out_no_removal:
if (cookie && _dm_use_udev())
(void)dm_udev_wait(cookie);
if (params)
safe_free(params);
if (dmt)
dm_task_destroy(dmt);
dm_task_update_nodes();
return r;
}
